With the BRNO baLens white balance lens cap, the camera will see colors as you do. Achieve custom white balance in seconds without taking your hands off the camera. Anyone who has invested a lot of time and energy into taking the best possible photos knows that setting the right white balance is extremely important. Digital SLR cameras do many things very well, but they cannot measure color with the same accuracy as the human eye. Not only is the BRNO baLens the best tool to solve this problem, but something you probably already have is a lens cap. With a simple lens accessory, you can turn your camera into an extension of your eyes.